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HackStudio+LibGUI: Implement matching curly brace highlighting

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This works for C++ syntax highlighted text documents by caching the C++
token type in a new "arbitrary data" member of GTextDocumentSpan.

When the cursor is placed immediately before a '{' or immediately after
a '}', we highlight both of these brace buddies by changing their
corresponding spans to have a different background color.

..and spans can also now have a custom background color. :^)
This commit is contained in:
Andreas Kling 2019-11-18 19:10:06 +01:00
parent 5f7f97355e
commit c8e02e60a6
Notes: sideshowbarker 2024-07-19 11:09:13 +09:00
6 changed files with 89 additions and 1 deletions
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5
Libraries/LibGUI/GTextEditor.cpp
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@ -389,6 +389,7 @@ void GTextEditor::paint_event(GPaintEvent& event)
for (int i = 0; i < visual_line_text.length(); ++i) {
const Font* font = &this->font();
Color color;
Optional<Color> background_color;
GTextPosition physical_position(line_index, start_of_visual_line + i);
// FIXME: This is *horribly* inefficient.
for (auto& span : document().spans()) {
@ -397,8 +398,11 @@ void GTextEditor::paint_event(GPaintEvent& event)
color = span.color;
if (span.font)
font = span.font;
background_color = span.background_color;
break;
}
if (background_color.has_value())
painter.fill_rect(character_rect, background_color.value());
painter.draw_text(character_rect, visual_line_text.substring_view(i, 1), *font, m_text_alignment, color);
character_rect.move_by(advance, 0);
}
@ -1135,6 +1139,7 @@ void GTextEditor::set_cursor(const GTextPosition& a_position)
update(old_cursor_line_rect);
update_cursor();
}
cursor_did_change();
if (on_cursor_change)
on_cursor_change();
}